Improved roofing-composition



. 2:52:13 aw 7 time gem @Bffm. g as ezeaa MARIEN GOULD, 'oFcHIcAe'o, ILLINOIS. Lem r8 Patent No. 84,820, dated December 8, 186 8.

IMPRQVED noor'nrecomosnmu The Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concern.- I

Be it known that I, MARIEN GOULD, of Ghicago,iu the county of Gook, and State of Illinois, have invented an Improved Roofing-Compound; and I do hereby declare that the following is a full, clear, and exact descriptionthereof, reference being had to the ingredients herein named, and tothe manner in which they are compounded. 4 I

To one gallon of common coal-tar,I add ten pounds of fine sand, two ounces of pine-tar, one-half ounce of whale or train-oil, and one ounce of japan varnish. These ingredients are put in any suitable vessel, and thoroughly incorporated, when they are subjected to about a boiling-heat. The compound is then ready to put on the felt. I v

The coal-tar, sand, and pine-tar have beennsed in roofing-compounds, and consequentlyl make no claim to novelty in their combined use, but use them as the base or more solid substance with the other ingredi-' ents hereinnamed.

I am fully apprised that lard and lard-oil Ila-yd been used in roofing-compounds, to prevent them fromdrying too rapidly, and that, so far as this object alone is concerned, either one will partially answer thepurpose; but-as oleine is the liquid part of lard and,

train-oil, and as the latter is composed of about onefourth more of this substance than lard, it is therefore much the best; and, besides this quality, it contains a small quantity of gelatine, derivedfrom thesinewy parts eight ounces of burnt umber, five ounces of asphaltum,,

of fish, which is valuable as a cement, whenit is used with the other ingredients named.

Experiments made with some lard-oils prove that they are manufactured of such ingredients as to be positively injurious to the other ingredients mentioned,

destroying their cohesive attraction, and. rendering a roof worthless; but as whale or train-oil is always to be found in nearly the same chemical condition, 'no

difl'iculty is experienced in its use. v

Common japan varnish (black)-is composed of about ten ounces of lamp-black, one-half gallon 'of turpentine, to one gallon of boiled linseed-oil.

The peculiar nature of this varnish is quite well 1inders'tood, especially in its usual application, but when it is combined with the other ingredients, it forms a chemical union, and produces a cement which is very hard and durable, and makes a roof which is water and l fire-proof.

Having thus described my invention,

What I claim, and desireto secure by Letters Patent of the United States, is-- The combination of the ingredients herein named, compounded substantially as and for the purpose specifled.

MARIEN GOULD.

Witnesses :j

Gno. L. 0mm, EDGAR E. Gnason. 

